git.sesse.net Git - vlc/blob - src/video_output/video_output.c

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  * This module describes the programming interface for video output threads.
   4  * It includes functions allowing to open a new thread, send pictures to a
   5  * thread, and destroy a previously oppened video output thread.
   6  *****************************************************************************
   7  * Copyright (C) 2000-2004 VideoLAN
   8  * $Id$
   9  *
  10  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30 #include <stdlib.h>                                                /* free() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #ifdef HAVE_SYS_TIMES_H
  35 #   include <sys/times.h>
  36 #endif
  37
  38 #include "vlc_video.h"
  39 #include "video_output.h"
  40 #include <vlc/input.h>                 /* for input_thread_t and i_pts_delay */
  41
  42 #if defined( SYS_DARWIN )
  43 #include "darwin_specific.h"
  44 #endif
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 static int      InitThread        ( vout_thread_t * );
  50 static void     RunThread         ( vout_thread_t * );
  51 static void     ErrorThread       ( vout_thread_t * );
  52 static void     EndThread         ( vout_thread_t * );
  53 static void     DestroyThread     ( vout_thread_t * );
  54
  55 static int      ReduceHeight      ( int );
  56 static int      BinaryLog         ( uint32_t );
  57 static void     MaskToShift       ( int *, int *, uint32_t );
  58 static void     InitWindowSize    ( vout_thread_t *, int *, int * );
  59
  60 void vout_IntfInit( vout_thread_t * );
  61
  62 /* Object variables callbacks */
  63 static int DeinterlaceCallback( vlc_object_t *, char const *,
  64                                 vlc_value_t, vlc_value_t, void * );
  65 static int FilterCallback( vlc_object_t *, char const *,
  66                            vlc_value_t, vlc_value_t, void * );
  67
  68 /**
  69  * vout_AspectRatio
  70  *
  71  * Set the i_aspect_x and i_aspect_y from i_aspect.
  72  */
  73 void vout_AspectRatio( unsigned int i_aspect,
  74                        /*out*/ unsigned int *i_aspect_x,
  75                        /*out*/ unsigned int *i_aspect_y )
  76 {
  77   unsigned int i_pgcd = ReduceHeight( i_aspect );
  78   *i_aspect_x = i_aspect / i_pgcd;
  79   *i_aspect_y = VOUT_ASPECT_FACTOR / i_pgcd;
  80 }
  81
  82 /*****************************************************************************
  83  * vout_Request: find a video output thread, create one, or destroy one.
  84  *****************************************************************************
  85  * This function looks for a video output thread matching the current
  86  * properties. If not found, it spawns a new one.
  87  *****************************************************************************/
  88 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
  89                                  unsigned int i_width, unsigned int i_height,
  90                                  vlc_fourcc_t i_chroma, unsigned int i_aspect )
  91 {
  92     if( !i_width || !i_height || !i_chroma )
  93     {
  94         /* Reattach video output to input before bailing out */
  95         if( p_vout )
  96         {
  97             vlc_object_t *p_playlist;
  98
  99             p_playlist = vlc_object_find( p_this,
 100                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 101
 102             if( p_playlist )
 103             {
 104                 vlc_object_detach( p_vout );
 105                 vlc_object_attach( p_vout, p_playlist );
 106
 107                 vlc_object_release( p_playlist );
 108             }
 109             else
 110             {
 111                 msg_Dbg( p_this, "cannot find playlist, destroying vout" );
 112                 vlc_object_detach( p_vout );
 113                 vout_Destroy( p_vout );
 114             }
 115         }
 116         return NULL;
 117     }
 118
 119     /* If a video output was provided, lock it, otherwise look for one. */
 120     if( p_vout )
 121     {
 122         vlc_object_yield( p_vout );
 123     }
 124     else
 125     {
 126         p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
 127
 128         if( !p_vout )
 129         {
 130             vlc_object_t *p_playlist;
 131
 132             p_playlist = vlc_object_find( p_this,
 133                                           VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 134             if( p_playlist )
 135             {
 136                 p_vout = vlc_object_find( p_playlist,
 137                                           VLC_OBJECT_VOUT, FIND_CHILD );
 138                 /* only first children of p_input for unused vout */
 139                 if( p_vout && p_vout->p_parent != p_playlist )
 140                 {
 141                     vlc_object_release( p_vout );
 142                     p_vout = NULL;
 143                 }
 144                 vlc_object_release( p_playlist );
 145             }
 146         }
 147     }
 148
 149     /* If we now have a video output, check it has the right properties */
 150     if( p_vout )
 151     {
 152         char *psz_filter_chain;
 153
 154         /* We don't directly check for the "filter" variable for obvious
 155          * performance reasons. */
 156         if( p_vout->b_filter_change )
 157         {
 158             psz_filter_chain = config_GetPsz( p_this, "filter" );
 159
 160             if( psz_filter_chain && !*psz_filter_chain )
 161             {
 162                 free( psz_filter_chain );
 163                 psz_filter_chain = NULL;
 164             }
 165             if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
 166             {
 167                 free( p_vout->psz_filter_chain );
 168                 p_vout->psz_filter_chain = NULL;
 169             }
 170
 171             if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
 172                 ( psz_filter_chain && p_vout->psz_filter_chain &&
 173                   !strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
 174             {
 175                 p_vout->b_filter_change = VLC_FALSE;
 176             }
 177
 178             if( psz_filter_chain ) free( psz_filter_chain );
 179         }
 180
 181         if( ( p_vout->render.i_width != i_width ) ||
 182             ( p_vout->render.i_height != i_height ) ||
 183             ( p_vout->render.i_chroma != i_chroma ) ||
 184             ( p_vout->render.i_aspect != i_aspect
 185                     && !p_vout->b_override_aspect ) ||
 186             p_vout->b_filter_change )
 187         {
 188             /* We are not interested in this format, close this vout */
 189             vlc_object_detach( p_vout );
 190             vlc_object_release( p_vout );
 191             vout_Destroy( p_vout );
 192             p_vout = NULL;
 193         }
 194         else
 195         {
 196             /* This video output is cool! Hijack it. */
 197             vlc_object_detach( p_vout );
 198             vlc_object_attach( p_vout, p_this );
 199             vlc_object_release( p_vout );
 200         }
 201     }
 202
 203     if( !p_vout )
 204     {
 205         msg_Dbg( p_this, "no usable vout present, spawning one" );
 206
 207         p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
 208     }
 209
 210     return p_vout;
 211 }
 212
 213 /*****************************************************************************
 214  * vout_Create: creates a new video output thread
 215  *****************************************************************************
 216  * This function creates a new video output thread, and returns a pointer
 217  * to its description. On error, it returns NULL.
 218  *****************************************************************************/
 219 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
 220                                unsigned int i_width, unsigned int i_height,
 221                                vlc_fourcc_t i_chroma, unsigned int i_aspect )
 222 {
 223     vout_thread_t  * p_vout;                            /* thread descriptor */
 224     input_thread_t * p_input_thread;
 225     int              i_index;                               /* loop variable */
 226     char           * psz_plugin;
 227     vlc_value_t      val, text;
 228
 229     /* Allocate descriptor */
 230     p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
 231     if( p_vout == NULL )
 232     {
 233         msg_Err( p_parent, "out of memory" );
 234         return NULL;
 235     }
 236
 237     /* Initialize pictures and subpictures - translation tables and functions
 238      * will be initialized later in InitThread */
 239     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
 240     {
 241         p_vout->p_picture[i_index].pf_lock = NULL;
 242         p_vout->p_picture[i_index].pf_unlock = NULL;
 243         p_vout->p_picture[i_index].i_status = FREE_PICTURE;
 244         p_vout->p_picture[i_index].i_type   = EMPTY_PICTURE;
 245     }
 246
 247     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
 248     {
 249         p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
 250         p_vout->p_subpicture[i_index].i_type   = EMPTY_SUBPICTURE;
 251     }
 252
 253     /* No images in the heap */
 254     p_vout->i_heap_size = 0;
 255
 256     /* Initialize the rendering heap */
 257     I_RENDERPICTURES = 0;
 258     p_vout->render.i_width    = i_width;
 259     p_vout->render.i_height   = i_height;
 260     p_vout->render.i_chroma   = i_chroma;
 261     p_vout->render.i_aspect   = i_aspect;
 262
 263     p_vout->render.i_rmask    = 0;
 264     p_vout->render.i_gmask    = 0;
 265     p_vout->render.i_bmask    = 0;
 266
 267     p_vout->render.i_last_used_pic = -1;
 268     p_vout->render.b_allow_modify_pics = 1;
 269
 270     /* Zero the output heap */
 271     I_OUTPUTPICTURES = 0;
 272     p_vout->output.i_width    = 0;
 273     p_vout->output.i_height   = 0;
 274     p_vout->output.i_chroma   = 0;
 275     p_vout->output.i_aspect   = 0;
 276
 277     p_vout->output.i_rmask    = 0;
 278     p_vout->output.i_gmask    = 0;
 279     p_vout->output.i_bmask    = 0;
 280
 281     /* Initialize misc stuff */
 282     p_vout->i_changes    = 0;
 283     p_vout->f_gamma      = 0;
 284     p_vout->b_grayscale  = 0;
 285     p_vout->b_info       = 0;
 286     p_vout->b_interface  = 0;
 287     p_vout->b_scale      = 1;
 288     p_vout->b_fullscreen = 0;
 289     p_vout->i_alignment  = 0;
 290     p_vout->render_time  = 10;
 291     p_vout->c_fps_samples = 0;
 292     p_vout->b_filter_change = 0;
 293     p_vout->pf_control = 0;
 294
 295     /* Mouse coordinates */
 296     var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
 297     var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
 298     var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 299     var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
 300     var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 301
 302     var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
 303     val.b_bool = VLC_TRUE;
 304     var_Set( p_vout, "intf-change", val );
 305
 306     /* Initialize locks */
 307     vlc_mutex_init( p_vout, &p_vout->picture_lock );
 308     vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
 309     vlc_mutex_init( p_vout, &p_vout->change_lock );
 310
 311     /* Attach the new object now so we can use var inheritance below */
 312     vlc_object_attach( p_vout, p_parent );
 313
 314     /* Take care of some "interface/control" related initialisations */
 315     vout_IntfInit( p_vout );
 316
 317     p_vout->b_override_aspect = VLC_FALSE;
 318
 319     /* If the parent is not a VOUT object, that means we are at the start of
 320      * the video output pipe */
 321     if( p_parent->i_object_type != VLC_OBJECT_VOUT )
 322     {
 323         var_Get( p_vout, "aspect-ratio", &val );
 324
 325         /* Check whether the user tried to override aspect ratio */
 326         if( val.psz_string )
 327         {
 328             unsigned int i_new_aspect = i_aspect;
 329             char *psz_parser = strchr( val.psz_string, ':' );
 330
 331             if( psz_parser )
 332             {
 333                 *psz_parser++ = '\0';
 334                 i_new_aspect = atoi( val.psz_string ) * VOUT_ASPECT_FACTOR
 335                                                       / atoi( psz_parser );
 336             }
 337             else
 338             {
 339                 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
 340                                        * atof( val.psz_string )
 341                                        / i_height;
 342             }
 343
 344             free( val.psz_string );
 345
 346             if( i_new_aspect && i_new_aspect != i_aspect )
 347             {
 348                 unsigned int i_aspect_x, i_aspect_y;
 349
 350                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 351
 352                 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
 353                          i_aspect_x, i_aspect_y );
 354
 355                 p_vout->render.i_aspect = i_new_aspect;
 356
 357                 p_vout->b_override_aspect = VLC_TRUE;
 358             }
 359         }
 360
 361         /* Look for the default filter configuration */
 362         var_Create( p_vout, "filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 363         var_Get( p_vout, "filter", &val );
 364         p_vout->psz_filter_chain = val.psz_string;
 365     }
 366     else
 367     {
 368         /* continue the parent's filter chain */
 369         char *psz_end;
 370
 371         psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
 372         if( psz_end && *(psz_end+1) )
 373             p_vout->psz_filter_chain = strdup( psz_end+1 );
 374         else p_vout->psz_filter_chain = NULL;
 375     }
 376
 377     /* Choose the video output module */
 378     if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 379     {
 380         var_Create( p_vout, "vout", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 381         var_Get( p_vout, "vout", &val );
 382         psz_plugin = val.psz_string;
 383     }
 384     else
 385     {
 386         /* the filter chain is a string list of filters separated by double
 387          * colons */
 388         char *psz_end;
 389
 390         psz_end = strchr( p_vout->psz_filter_chain, ':' );
 391         if( psz_end )
 392             psz_plugin = strndup( p_vout->psz_filter_chain,
 393                                   psz_end - p_vout->psz_filter_chain );
 394         else psz_plugin = strdup( p_vout->psz_filter_chain );
 395     }
 396
 397     /* Initialize the dimensions of the video window */
 398     InitWindowSize( p_vout, &p_vout->i_window_width,
 399                     &p_vout->i_window_height );
 400
 401     /* Create the vout thread */
 402     p_vout->p_module = module_Need( p_vout,
 403         ( p_vout->psz_filter_chain && *p_vout->psz_filter_chain ) ?
 404         "video filter" : "video output", psz_plugin, 0 );
 405
 406     if( psz_plugin ) free( psz_plugin );
 407     if( p_vout->p_module == NULL )
 408     {
 409         msg_Err( p_vout, "no suitable vout module" );
 410         vlc_object_destroy( p_vout );
 411         return NULL;
 412     }
 413
 414     p_vout->p_text_renderer_module =
 415         module_Need( p_vout, "text renderer", NULL, 0 );
 416     if( p_vout->p_text_renderer_module == NULL )
 417     {
 418         msg_Warn( p_vout, "no suitable text renderer module" );
 419         p_vout->pf_add_string = NULL;
 420     }
 421
 422     /* Create a few object variables for interface interaction */
 423     var_Create( p_vout, "deinterlace", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
 424     text.psz_string = _("Deinterlace");
 425     var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
 426     val.psz_string = ""; text.psz_string = _("Disable");
 427     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 428     val.psz_string = "discard"; text.psz_string = _("Discard");
 429     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 430     val.psz_string = "blend"; text.psz_string = _("Blend");
 431     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 432     val.psz_string = "mean"; text.psz_string = _("Mean");
 433     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 434     val.psz_string = "bob"; text.psz_string = _("Bob");
 435     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 436     val.psz_string = "linear"; text.psz_string = _("Linear");
 437     var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
 438     if( var_Get( p_vout, "deinterlace-mode", &val ) == VLC_SUCCESS )
 439     {
 440         var_Set( p_vout, "deinterlace", val );
 441         if( val.psz_string ) free( val.psz_string );
 442     }
 443     var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
 444
 445
 446     var_Create( p_vout, "filter", VLC_VAR_STRING );
 447     text.psz_string = _("Filters");
 448     var_Change( p_vout, "filter", VLC_VAR_SETTEXT, &text, NULL );
 449     var_Change( p_vout, "filter", VLC_VAR_INHERITVALUE, &val, NULL );
 450     if( val.psz_string )
 451     {
 452         var_Set( p_vout, "filter", val );
 453         free( val.psz_string );
 454     }
 455     var_AddCallback( p_vout, "filter", FilterCallback, NULL );
 456
 457     /* Calculate delay created by internal caching */
 458     p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
 459                                            VLC_OBJECT_INPUT, FIND_ANYWHERE );
 460     if( p_input_thread )
 461     {
 462         p_vout->i_pts_delay = p_input_thread->i_pts_delay;
 463         vlc_object_release( p_input_thread );
 464     }
 465     else
 466     {
 467         p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
 468     }
 469
 470     if( vlc_thread_create( p_vout, "video output", RunThread,
 471                            VLC_THREAD_PRIORITY_OUTPUT, VLC_TRUE ) )
 472     {
 473         msg_Err( p_vout, "out of memory" );
 474         module_Unneed( p_vout, p_vout->p_module );
 475         vlc_object_detach( p_vout );
 476         vlc_object_destroy( p_vout );
 477         return NULL;
 478     }
 479
 480     if( p_vout->b_error )
 481     {
 482         msg_Err( p_vout, "video output creation failed" );
 483
 484         /* Make sure the thread is destroyed */
 485         p_vout->b_die = VLC_TRUE;
 486         vlc_thread_join( p_vout );
 487
 488         vlc_object_detach( p_vout );
 489         vlc_object_destroy( p_vout );
 490         return NULL;
 491     }
 492
 493     return p_vout;
 494 }
 495
 496 /*****************************************************************************
 497  * vout_Destroy: destroys a previously created video output
 498  *****************************************************************************
 499  * Destroy a terminated thread.
 500  * The function will request a destruction of the specified thread. If pi_error
 501  * is NULL, it will return once the thread is destroyed. Else, it will be
 502  * update using one of the THREAD_* constants.
 503  *****************************************************************************/
 504 void vout_Destroy( vout_thread_t *p_vout )
 505 {
 506     vlc_object_t *p_playlist;
 507
 508     /* Request thread destruction */
 509     p_vout->b_die = VLC_TRUE;
 510     vlc_thread_join( p_vout );
 511
 512     var_Destroy( p_vout, "intf-change" );
 513
 514     p_playlist = vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
 515                                   FIND_ANYWHERE );
 516
 517     if( p_vout->psz_filter_chain ) free( p_vout->psz_filter_chain );
 518
 519     /* Free structure */
 520     vlc_object_destroy( p_vout );
 521
 522     /* If it was the last vout, tell the interface to show up */
 523     if( p_playlist != NULL )
 524     {
 525         vout_thread_t *p_another_vout = vlc_object_find( p_playlist,
 526                                             VLC_OBJECT_VOUT, FIND_ANYWHERE );
 527         if( p_another_vout == NULL )
 528         {
 529             vlc_value_t val;
 530             val.b_bool = VLC_TRUE;
 531             var_Set( p_playlist, "intf-show", val );
 532         }
 533         else
 534         {
 535             vlc_object_release( p_another_vout );
 536         }
 537         vlc_object_release( p_playlist );
 538     }
 539 }
 540
 541 /*****************************************************************************
 542  * InitThread: initialize video output thread
 543  *****************************************************************************
 544  * This function is called from RunThread and performs the second step of the
 545  * initialization. It returns 0 on success. Note that the thread's flag are not
 546  * modified inside this function.
 547  *****************************************************************************/
 548 static int InitThread( vout_thread_t *p_vout )
 549 {
 550     int i;
 551     unsigned int i_aspect_x, i_aspect_y;
 552
 553     vlc_mutex_lock( &p_vout->change_lock );
 554
 555 #ifdef STATS
 556     p_vout->c_loops = 0;
 557 #endif
 558
 559     /* Initialize output method, it allocates direct buffers for us */
 560     if( p_vout->pf_init( p_vout ) )
 561     {
 562         vlc_mutex_unlock( &p_vout->change_lock );
 563         return VLC_EGENERIC;
 564     }
 565
 566     if( !I_OUTPUTPICTURES )
 567     {
 568         msg_Err( p_vout, "plugin was unable to allocate at least "
 569                          "one direct buffer" );
 570         p_vout->pf_end( p_vout );
 571         vlc_mutex_unlock( &p_vout->change_lock );
 572         return VLC_EGENERIC;
 573     }
 574
 575     if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
 576     {
 577         msg_Err( p_vout, "plugin allocated too many direct buffers, "
 578                          "our internal buffers must have overflown." );
 579         p_vout->pf_end( p_vout );
 580         vlc_mutex_unlock( &p_vout->change_lock );
 581         return VLC_EGENERIC;
 582     }
 583
 584     msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
 585
 586 #if 0
 587     if( !p_vout->psz_filter_chain )
 588     {
 589         char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
 590
 591         if( psz_aspect )
 592         {
 593             int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
 594                                                       * atof( psz_aspect )
 595                                                       / p_vout->output.i_height;
 596             free( psz_aspect );
 597
 598             if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
 599             {
 600                 vout_AspectRatio( i_new_aspect, &i_aspect_x, &i_aspect_y );
 601
 602                 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
 603                          i_aspect_x, i_aspect_y );
 604                 p_vout->output.i_aspect = i_new_aspect;
 605             }
 606         }
 607     }
 608 #endif
 609
 610     vout_AspectRatio( p_vout->render.i_aspect, &i_aspect_x, &i_aspect_y );
 611     msg_Dbg( p_vout,
 612              "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 613              p_vout->render.i_width, p_vout->render.i_height,
 614              p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
 615              i_aspect_x, i_aspect_y );
 616
 617     vout_AspectRatio( p_vout->output.i_aspect, &i_aspect_x, &i_aspect_y );
 618     msg_Dbg( p_vout,
 619              "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
 620              p_vout->output.i_width, p_vout->output.i_height,
 621              p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
 622              i_aspect_x, i_aspect_y );
 623
 624     /* Calculate shifts from system-updated masks */
 625     MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
 626                  p_vout->output.i_rmask );
 627     MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
 628                  p_vout->output.i_gmask );
 629     MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
 630                  p_vout->output.i_bmask );
 631
 632     /* Check whether we managed to create direct buffers similar to
 633      * the render buffers, ie same size and chroma */
 634     if( ( p_vout->output.i_width == p_vout->render.i_width )
 635      && ( p_vout->output.i_height == p_vout->render.i_height )
 636      && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
 637     {
 638         /* Cool ! We have direct buffers, we can ask the decoder to
 639          * directly decode into them ! Map the first render buffers to
 640          * the first direct buffers, but keep the first direct buffer
 641          * for memcpy operations */
 642         p_vout->b_direct = 1;
 643
 644         for( i = 1; i < VOUT_MAX_PICTURES; i++ )
 645         {
 646             if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
 647                 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
 648                 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
 649             {
 650                 /* We have enough direct buffers so there's no need to
 651                  * try to use system memory buffers. */
 652                 break;
 653             }
 654             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 655             I_RENDERPICTURES++;
 656         }
 657
 658         msg_Dbg( p_vout, "direct render, mapping "
 659                  "render pictures 0-%i to system pictures 1-%i",
 660                  VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
 661     }
 662     else
 663     {
 664         /* Rats... Something is wrong here, we could not find an output
 665          * plugin able to directly render what we decode. See if we can
 666          * find a chroma plugin to do the conversion */
 667         p_vout->b_direct = 0;
 668
 669         /* Choose the best module */
 670         p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL, 0 );
 671
 672         if( p_vout->chroma.p_module == NULL )
 673         {
 674             msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
 675                      (char*)&p_vout->render.i_chroma,
 676                      (char*)&p_vout->output.i_chroma );
 677             p_vout->pf_end( p_vout );
 678             vlc_mutex_unlock( &p_vout->change_lock );
 679             return VLC_EGENERIC;
 680         }
 681
 682         msg_Dbg( p_vout, "indirect render, mapping "
 683                  "render pictures 0-%i to system pictures %i-%i",
 684                  VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
 685                  I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
 686
 687         /* Append render buffers after the direct buffers */
 688         for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
 689         {
 690             PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
 691             I_RENDERPICTURES++;
 692
 693             /* Check if we have enough render pictures */
 694             if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
 695                 break;
 696         }
 697     }
 698
 699     /* Link pictures back to their heap */
 700     for( i = 0 ; i < I_RENDERPICTURES ; i++ )
 701     {
 702         PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
 703     }
 704
 705     for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
 706     {
 707         PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
 708     }
 709
 710 /* XXX XXX mark thread ready */
 711     return VLC_SUCCESS;
 712 }
 713
 714 /*****************************************************************************
 715  * RunThread: video output thread
 716  *****************************************************************************
 717  * Video output thread. This function does only returns when the thread is
 718  * terminated. It handles the pictures arriving in the video heap and the
 719  * display device events.
 720  *****************************************************************************/
 721 static void RunThread( vout_thread_t *p_vout)
 722 {
 723     int             i_index;                                /* index in heap */
 724     int             i_idle_loops = 0;  /* loops without displaying a picture */
 725     mtime_t         current_date;                            /* current date */
 726     mtime_t         display_date;                            /* display date */
 727
 728     picture_t *     p_picture;                            /* picture pointer */
 729     picture_t *     p_last_picture = NULL;                   /* last picture */
 730     picture_t *     p_directbuffer;              /* direct buffer to display */
 731
 732     subpicture_t *  p_subpic;                          /* subpicture pointer */
 733
 734     /*
 735      * Initialize thread
 736      */
 737     p_vout->b_error = InitThread( p_vout );
 738
 739     /* signal the creation of the vout */
 740     vlc_thread_ready( p_vout );
 741
 742     if( p_vout->b_error )
 743     {
 744         /* Destroy thread structures allocated by Create and InitThread */
 745         DestroyThread( p_vout );
 746         return;
 747     }
 748
 749     /*
 750      * Main loop - it is not executed if an error occured during
 751      * initialization
 752      */
 753     while( (!p_vout->b_die) && (!p_vout->b_error) )
 754     {
 755         /* Initialize loop variables */
 756         p_picture = NULL;
 757         display_date = 0;
 758         current_date = mdate();
 759
 760 #if 0
 761         p_vout->c_loops++;
 762         if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
 763         {
 764             msg_Dbg( p_vout, "picture heap: %d/%d",
 765                      I_RENDERPICTURES, p_vout->i_heap_size );
 766         }
 767 #endif
 768
 769         /*
 770          * Find the picture to display (the one with the earliest date).
 771          * This operation does not need lock, since only READY_PICTUREs
 772          * are handled. */
 773         for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 774         {
 775             if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 776                 && ( (p_picture == NULL) ||
 777                      (PP_RENDERPICTURE[i_index]->date < display_date) ) )
 778             {
 779                 p_picture = PP_RENDERPICTURE[i_index];
 780                 display_date = p_picture->date;
 781             }
 782         }
 783
 784         if( p_picture )
 785         {
 786             /* If we met the last picture, parse again to see whether there is
 787              * a more appropriate one. */
 788             if( p_picture == p_last_picture )
 789             {
 790                 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
 791                 {
 792                     if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
 793                         && (PP_RENDERPICTURE[i_index] != p_last_picture)
 794                         && ((p_picture == p_last_picture) ||
 795                             (PP_RENDERPICTURE[i_index]->date < display_date)) )
 796                     {
 797                         p_picture = PP_RENDERPICTURE[i_index];
 798                         display_date = p_picture->date;
 799                     }
 800                 }
 801             }
 802
 803             /* If we found better than the last picture, destroy it */
 804             if( p_last_picture && p_picture != p_last_picture )
 805             {
 806                 vlc_mutex_lock( &p_vout->picture_lock );
 807                 if( p_last_picture->i_refcount )
 808                 {
 809                     p_last_picture->i_status = DISPLAYED_PICTURE;
 810                 }
 811                 else
 812                 {
 813                     p_last_picture->i_status = DESTROYED_PICTURE;
 814                     p_vout->i_heap_size--;
 815                 }
 816                 vlc_mutex_unlock( &p_vout->picture_lock );
 817                 p_last_picture = NULL;
 818             }
 819
 820             /* Compute FPS rate */
 821             p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
 822                 = display_date;
 823
 824             if( !p_picture->b_force &&
 825                 p_picture != p_last_picture &&
 826                 display_date < current_date + p_vout->render_time )
 827             {
 828                 /* Picture is late: it will be destroyed and the thread
 829                  * will directly choose the next picture */
 830                 vlc_mutex_lock( &p_vout->picture_lock );
 831                 if( p_picture->i_refcount )
 832                 {
 833                     /* Pretend we displayed the picture, but don't destroy
 834                      * it since the decoder might still need it. */
 835                     p_picture->i_status = DISPLAYED_PICTURE;
 836                 }
 837                 else
 838                 {
 839                     /* Destroy the picture without displaying it */
 840                     p_picture->i_status = DESTROYED_PICTURE;
 841                     p_vout->i_heap_size--;
 842                 }
 843                 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
 844                                   current_date - display_date );
 845                 vlc_mutex_unlock( &p_vout->picture_lock );
 846
 847                 continue;
 848             }
 849
 850             if( display_date >
 851                 current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
 852             {
 853                 /* Picture is waaay too early: it will be destroyed */
 854                 vlc_mutex_lock( &p_vout->picture_lock );
 855                 if( p_picture->i_refcount )
 856                 {
 857                     /* Pretend we displayed the picture, but don't destroy
 858                      * it since the decoder might still need it. */
 859                     p_picture->i_status = DISPLAYED_PICTURE;
 860                 }
 861                 else
 862                 {
 863                     /* Destroy the picture without displaying it */
 864                     p_picture->i_status = DESTROYED_PICTURE;
 865                     p_vout->i_heap_size--;
 866                 }
 867                 msg_Warn( p_vout, "vout warning: early picture skipped "
 868                           "("I64Fd")", display_date - current_date
 869                           - p_vout->i_pts_delay );
 870                 vlc_mutex_unlock( &p_vout->picture_lock );
 871
 872                 continue;
 873             }
 874
 875             if( display_date > current_date + VOUT_DISPLAY_DELAY )
 876             {
 877                 /* A picture is ready to be rendered, but its rendering date
 878                  * is far from the current one so the thread will perform an
 879                  * empty loop as if no picture were found. The picture state
 880                  * is unchanged */
 881                 p_picture    = NULL;
 882                 display_date = 0;
 883             }
 884             else if( p_picture == p_last_picture )
 885             {
 886                 /* We are asked to repeat the previous picture, but we first
 887                  * wait for a couple of idle loops */
 888                 if( i_idle_loops < 4 )
 889                 {
 890                     p_picture    = NULL;
 891                     display_date = 0;
 892                 }
 893                 else
 894                 {
 895                     /* We set the display date to something high, otherwise
 896                      * we'll have lots of problems with late pictures */
 897                     display_date = current_date + p_vout->render_time;
 898                 }
 899             }
 900         }
 901
 902         if( p_picture == NULL )
 903         {
 904             i_idle_loops++;
 905         }
 906
 907         /*
 908          * Check for subpictures to display
 909          */
 910         p_subpic = vout_SortSubPictures( p_vout, display_date );
 911
 912         /*
 913          * Perform rendering
 914          */
 915         p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
 916
 917         /*
 918          * Call the plugin-specific rendering method if there is one
 919          */
 920         if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
 921         {
 922             /* Render the direct buffer returned by vout_RenderPicture */
 923             p_vout->pf_render( p_vout, p_directbuffer );
 924         }
 925
 926         /*
 927          * Sleep, wake up
 928          */
 929         if( display_date != 0 && p_directbuffer != NULL )
 930         {
 931             mtime_t current_render_time = mdate() - current_date;
 932             /* if render time is very large we don't include it in the mean */
 933             if( current_render_time < p_vout->render_time +
 934                 VOUT_DISPLAY_DELAY )
 935             {
 936                 /* Store render time using a sliding mean weighting to
 937                  * current value in a 3 to 1 ratio*/
 938                 p_vout->render_time *= 3;
 939                 p_vout->render_time += current_render_time;
 940                 p_vout->render_time >>= 2;
 941             }
 942         }
 943
 944         /* Give back change lock */
 945         vlc_mutex_unlock( &p_vout->change_lock );
 946
 947         /* Sleep a while or until a given date */
 948         if( display_date != 0 )
 949         {
 950             /* If there are filters in the chain, better give them the picture
 951              * in advance */
 952             if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
 953             {
 954                 mwait( display_date - VOUT_MWAIT_TOLERANCE );
 955             }
 956         }
 957         else
 958         {
 959             msleep( VOUT_IDLE_SLEEP );
 960         }
 961
 962         /* On awakening, take back lock and send immediately picture
 963          * to display. */
 964         vlc_mutex_lock( &p_vout->change_lock );
 965
 966         /*
 967          * Display the previously rendered picture
 968          */
 969         if( p_picture != NULL && p_directbuffer != NULL )
 970         {
 971             /* Display the direct buffer returned by vout_RenderPicture */
 972             if( p_vout->pf_display )
 973             {
 974                 p_vout->pf_display( p_vout, p_directbuffer );
 975             }
 976
 977             /* Reinitialize idle loop count */
 978             i_idle_loops = 0;
 979
 980             /* Tell the vout this was the last picture and that it does not
 981              * need to be forced anymore. */
 982             p_last_picture = p_picture;
 983             p_last_picture->b_force = 0;
 984         }
 985
 986         /*
 987          * Check events and manage thread
 988          */
 989         if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
 990         {
 991             /* A fatal error occured, and the thread must terminate
 992              * immediately, without displaying anything - setting b_error to 1
 993              * causes the immediate end of the main while() loop. */
 994             p_vout->b_error = 1;
 995         }
 996
 997         if( p_vout->i_changes & VOUT_SIZE_CHANGE )
 998         {
 999             /* this must only happen when the vout plugin is incapable of
1000              * rescaling the picture itself. In this case we need to destroy
1001              * the current picture buffers and recreate new ones with the right
1002              * dimensions */
1003             int i;
1004
1005             p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
1006
1007             p_vout->pf_end( p_vout );
1008             for( i = 0; i < I_OUTPUTPICTURES; i++ )
1009                  p_vout->p_picture[ i ].i_status = FREE_PICTURE;
1010
1011             I_OUTPUTPICTURES = 0;
1012             if( p_vout->pf_init( p_vout ) )
1013             {
1014                 msg_Err( p_vout, "cannot resize display" );
1015                 /* FIXME: pf_end will be called again in EndThread() */
1016                 p_vout->b_error = 1;
1017             }
1018
1019             /* Need to reinitialise the chroma plugin */
1020             if( p_vout->chroma.p_module )
1021             {
1022                 if( p_vout->chroma.p_module->pf_deactivate )
1023                     p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
1024                 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
1025             }
1026         }
1027
1028         if( p_vout->i_changes & VOUT_PICTURE_BUFFERS_CHANGE )
1029         {
1030             /* This happens when the picture buffers need to be recreated.
1031              * This is useful on multimonitor displays for instance.
1032              *
1033              * Warning: This only works when the vout creates only 1 picture
1034              * buffer!! */
1035             p_vout->i_changes &= ~VOUT_PICTURE_BUFFERS_CHANGE;
1036
1037             if( !p_vout->b_direct )
1038             {
1039                 module_Unneed( p_vout, p_vout->chroma.p_module );
1040             }
1041
1042             vlc_mutex_lock( &p_vout->picture_lock );
1043
1044             p_vout->pf_end( p_vout );
1045
1046             I_OUTPUTPICTURES = I_RENDERPICTURES = 0;
1047
1048             p_vout->b_error = InitThread( p_vout );
1049
1050             vlc_mutex_unlock( &p_vout->picture_lock );
1051         }
1052     }
1053
1054     /*
1055      * Error loop - wait until the thread destruction is requested
1056      */
1057     if( p_vout->b_error )
1058     {
1059         ErrorThread( p_vout );
1060     }
1061
1062     /* End of thread */
1063     EndThread( p_vout );
1064
1065     /* Destroy thread structures allocated by CreateThread */
1066     DestroyThread( p_vout );
1067 }
1068
1069 /*****************************************************************************
1070  * ErrorThread: RunThread() error loop
1071  *****************************************************************************
1072  * This function is called when an error occured during thread main's loop. The
1073  * thread can still receive feed, but must be ready to terminate as soon as
1074  * possible.
1075  *****************************************************************************/
1076 static void ErrorThread( vout_thread_t *p_vout )
1077 {
1078     /* Wait until a `die' order */
1079     while( !p_vout->b_die )
1080     {
1081         /* Sleep a while */
1082         msleep( VOUT_IDLE_SLEEP );
1083     }
1084 }
1085
1086 /*****************************************************************************
1087  * EndThread: thread destruction
1088  *****************************************************************************
1089  * This function is called when the thread ends after a sucessful
1090  * initialization. It frees all ressources allocated by InitThread.
1091  *****************************************************************************/
1092 static void EndThread( vout_thread_t *p_vout )
1093 {
1094     int     i_index;                                        /* index in heap */
1095
1096 #ifdef STATS
1097     {
1098         struct tms cpu_usage;
1099         times( &cpu_usage );
1100
1101         msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
1102                  cpu_usage.tms_utime, cpu_usage.tms_stime );
1103     }
1104 #endif
1105
1106     if( !p_vout->b_direct )
1107     {
1108         module_Unneed( p_vout, p_vout->chroma.p_module );
1109     }
1110
1111     /* Destroy all remaining pictures */
1112     for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
1113     {
1114         if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
1115         {
1116             free( p_vout->p_picture[i_index].p_data_orig );
1117         }
1118     }
1119
1120     /* Destroy all remaining subpictures */
1121     for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1122     {
1123         if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
1124         {
1125             vout_DestroySubPicture( p_vout,
1126                                     &p_vout->p_subpicture[i_index] );
1127         }
1128     }
1129
1130     if( p_vout->p_text_renderer_module )
1131         module_Unneed( p_vout, p_vout->p_text_renderer_module );
1132
1133     /* Destroy translation tables */
1134     p_vout->pf_end( p_vout );
1135
1136     /* Release the change lock */
1137     vlc_mutex_unlock( &p_vout->change_lock );
1138 }
1139
1140 /*****************************************************************************
1141  * DestroyThread: thread destruction
1142  *****************************************************************************
1143  * This function is called when the thread ends. It frees all ressources
1144  * allocated by CreateThread. Status is available at this stage.
1145  *****************************************************************************/
1146 static void DestroyThread( vout_thread_t *p_vout )
1147 {
1148     /* Destroy the locks */
1149     vlc_mutex_destroy( &p_vout->picture_lock );
1150     vlc_mutex_destroy( &p_vout->subpicture_lock );
1151     vlc_mutex_destroy( &p_vout->change_lock );
1152
1153     /* Release the module */
1154     module_Unneed( p_vout, p_vout->p_module );
1155 }
1156
1157 /* following functions are local */
1158
1159 static int ReduceHeight( int i_ratio )
1160 {
1161     int i_dummy = VOUT_ASPECT_FACTOR;
1162     int i_pgcd  = 1;
1163
1164     if( !i_ratio )
1165     {
1166         return i_pgcd;
1167     }
1168
1169     /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
1170     while( !(i_ratio & 1) && !(i_dummy & 1) )
1171     {
1172         i_ratio >>= 1;
1173         i_dummy >>= 1;
1174         i_pgcd  <<= 1;
1175     }
1176
1177     while( !(i_ratio % 3) && !(i_dummy % 3) )
1178     {
1179         i_ratio /= 3;
1180         i_dummy /= 3;
1181         i_pgcd  *= 3;
1182     }
1183
1184     while( !(i_ratio % 5) && !(i_dummy % 5) )
1185     {
1186         i_ratio /= 5;
1187         i_dummy /= 5;
1188         i_pgcd  *= 5;
1189     }
1190
1191     return i_pgcd;
1192 }
1193
1194 /*****************************************************************************
1195  * BinaryLog: computes the base 2 log of a binary value
1196  *****************************************************************************
1197  * This functions is used by MaskToShift, to get a bit index from a binary
1198  * value.
1199  *****************************************************************************/
1200 static int BinaryLog( uint32_t i )
1201 {
1202     int i_log = 0;
1203
1204     if( i == 0 ) return -31337;
1205
1206     if( i & 0xffff0000 ) i_log += 16;
1207     if( i & 0xff00ff00 ) i_log += 8;
1208     if( i & 0xf0f0f0f0 ) i_log += 4;
1209     if( i & 0xcccccccc ) i_log += 2;
1210     if( i & 0xaaaaaaaa ) i_log += 1;
1211
1212     return i_log;
1213 }
1214
1215 /*****************************************************************************
1216  * MaskToShift: transform a color mask into right and left shifts
1217  *****************************************************************************
1218  * This function is used for obtaining color shifts from masks.
1219  *****************************************************************************/
1220 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
1221 {
1222     uint32_t i_low, i_high;            /* lower hand higher bits of the mask */
1223
1224     if( !i_mask )
1225     {
1226         *pi_left = *pi_right = 0;
1227         return;
1228     }
1229
1230     /* Get bits */
1231     i_low =  i_mask & (- (int32_t)i_mask);          /* lower bit of the mask */
1232     i_high = i_mask + i_low;                       /* higher bit of the mask */
1233
1234     /* Transform bits into an index */
1235     i_low =  BinaryLog (i_low);
1236     i_high = BinaryLog (i_high);
1237
1238     /* Update pointers and return */
1239     *pi_left =   i_low;
1240     *pi_right = (8 - i_high + i_low);
1241 }
1242
1243 /*****************************************************************************
1244  * InitWindowSize: find the initial dimensions the video window should have.
1245  *****************************************************************************
1246  * This function will check the "width", "height" and "zoom" config options and
1247  * will calculate the size that the video window should have.
1248  *****************************************************************************/
1249 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1250                             int *pi_height )
1251 {
1252     vlc_value_t val;
1253     int i_width, i_height;
1254     uint64_t ll_zoom;
1255
1256 #define FP_FACTOR 1000                             /* our fixed point factor */
1257
1258     var_Get( p_vout, "align", &val );
1259     p_vout->i_alignment = val.i_int;
1260
1261     var_Get( p_vout, "width", &val );
1262     i_width = val.i_int;
1263     var_Get( p_vout, "height", &val );
1264     i_height = val.i_int;
1265     var_Get( p_vout, "zoom", &val );
1266     ll_zoom = (uint64_t)( FP_FACTOR * val.f_float );
1267
1268     if( i_width > 0 && i_height > 0)
1269     {
1270         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1271         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1272         return;
1273     }
1274     else if( i_width > 0 )
1275     {
1276         *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1277         *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1278                             p_vout->render.i_aspect / FP_FACTOR );
1279         return;
1280     }
1281     else if( i_height > 0 )
1282     {
1283         *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1284         *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1285                            VOUT_ASPECT_FACTOR / FP_FACTOR );
1286         return;
1287     }
1288
1289     if( p_vout->render.i_height * p_vout->render.i_aspect
1290         >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1291     {
1292         *pi_width = (int)( p_vout->render.i_height * ll_zoom
1293           * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1294         *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1295     }
1296     else
1297     {
1298         *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1299         *pi_height = (int)( p_vout->render.i_width * ll_zoom
1300           * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1301     }
1302
1303 #undef FP_FACTOR
1304 }
1305
1306 /*****************************************************************************
1307  * vout_VarCallback: generic callback for intf variables
1308  *****************************************************************************/
1309 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1310                       vlc_value_t old_value, vlc_value_t new_value,
1311                       void * unused )
1312 {
1313     vout_thread_t * p_vout = (vout_thread_t *)p_this;
1314     vlc_value_t val;
1315     val.b_bool = VLC_TRUE;
1316     var_Set( p_vout, "intf-change", val );
1317     return VLC_SUCCESS;
1318 }
1319
1320 /*****************************************************************************
1321  * object variables callbacks: a bunch of object variables are used by the
1322  * interfaces to interact with the vout.
1323  *****************************************************************************/
1324 static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
1325                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1326 {
1327     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1328     input_thread_t *p_input;
1329     vlc_value_t val;
1330
1331     char *psz_mode = newval.psz_string;
1332     char *psz_filter;
1333     unsigned int  i;
1334
1335     psz_filter = config_GetPsz( p_vout, "filter" );
1336
1337     if( !psz_mode || !*psz_mode )
1338     {
1339         config_PutPsz( p_vout, "filter", "" );
1340     }
1341     else
1342     {
1343         if( !psz_filter || !*psz_filter )
1344         {
1345             config_PutPsz( p_vout, "filter", "deinterlace" );
1346         }
1347         else
1348         {
1349             if( strstr( psz_filter, "deinterlace" ) == NULL )
1350             {
1351                 psz_filter = realloc( psz_filter, strlen( psz_filter ) + 20 );
1352                 strcat( psz_filter, ",deinterlace" );
1353             }
1354             config_PutPsz( p_vout, "filter", psz_filter );
1355         }
1356     }
1357
1358     if( psz_filter ) free( psz_filter );
1359
1360
1361     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1362                                                  FIND_PARENT );
1363     if( !p_input ) return VLC_EGENERIC;
1364
1365     if( psz_mode && *psz_mode )
1366     {
1367         val.psz_string = psz_mode;
1368         var_Set( p_vout, "deinterlace-mode", val );
1369         /* Modify input as well because the vout might have to be restarted */
1370         var_Create( p_input, "deinterlace-mode", VLC_VAR_STRING );
1371         var_Set( p_input, "deinterlace-mode", val );
1372     }
1373
1374     /* now restart all video streams */
1375     vlc_mutex_lock( &p_input->stream.stream_lock );
1376
1377     p_vout->b_filter_change = VLC_TRUE;
1378
1379 #define ES p_input->stream.pp_es[i]
1380
1381     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1382     {
1383         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1384         {
1385             input_UnselectES( p_input, ES );
1386             input_SelectES( p_input, ES );
1387         }
1388 #undef ES
1389     }
1390     vlc_mutex_unlock( &p_input->stream.stream_lock );
1391
1392     vlc_object_release( p_input );
1393
1394     val.b_bool = VLC_TRUE;
1395     var_Set( p_vout, "intf-change", val );
1396     return VLC_SUCCESS;
1397 }
1398
1399 static int FilterCallback( vlc_object_t *p_this, char const *psz_cmd,
1400                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
1401 {
1402     vout_thread_t *p_vout = (vout_thread_t *)p_this;
1403     input_thread_t *p_input;
1404     vlc_value_t val;
1405     unsigned int i;
1406
1407     p_input = (input_thread_t *)vlc_object_find( p_this, VLC_OBJECT_INPUT,
1408                                                  FIND_PARENT );
1409
1410     if (!p_input)
1411     {
1412         msg_Err( p_vout, "Input not found" );
1413         return( VLC_EGENERIC );
1414     }
1415     /* Restart the video stream */
1416     vlc_mutex_lock( &p_input->stream.stream_lock );
1417
1418     p_vout->b_filter_change = VLC_TRUE;
1419
1420 #define ES p_input->stream.pp_es[i]
1421
1422     for( i = 0 ; i < p_input->stream.i_es_number ; i++ )
1423     {
1424         if( ( ES->i_cat == VIDEO_ES ) && ES->p_dec != NULL )
1425         {
1426             input_UnselectES( p_input, ES );
1427             input_SelectES( p_input, ES );
1428         }
1429 #undef ES
1430     }
1431     vlc_mutex_unlock( &p_input->stream.stream_lock );
1432
1433     vlc_object_release( p_input );
1434
1435     val.b_bool = VLC_TRUE;
1436     var_Set( p_vout, "intf-change", val );
1437     return VLC_SUCCESS;
1438 }
1439